Dark circles under the eyes can be due to different factors, few of which are stress, exposure to sun light, fatigue, aging, irregular life style habits, hereditary factors etc.

In most people, with age, dark circles appear under the eyes due to skin losing collagen. Eyes are one of the most delicate organs in a human body, that show signs of aging or stress.

Heath ailments like severe dehydration, malnutrition, liver disease and hypothyroidism may cause dark circles and the skin around the eyes can appear hollow.

Dietary changes and intake of supplements & vitamins, taking proper medicine for thyroid disease can help reduce dark circles.